Hyster W20-30ZR, Manual

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Valve Repair 2000 SRM 1025
3. Turn key switch to OFF position and disconnect
battery.
4. Block load wheels to prevent lift truck from mov-
ing. Refer to Periodic Maintenance 8000 SRM
1027.
5. Remove the drive unit compartment cover. On
W25/30/40ZC lift trucks, also remove the hy-
draulic compartment cover.
6. Discharge the capacitor. See Special Precau-
tions.
WARNING
There are pinch points on the reach carriage
that can cause an injury.
Use clamps and
blocks to stop the scissor arms from moving.
7. On W20/30ZR lift trucks, install clamps and
blocks (on both sides) between the load bearings
and the bottom of the rear frame of the reach
assembly to keep the forks from retracting. See
Figure 8.
8. Remove the locking screw from the control wiring
plug. Disconnect the plug from the coil. See Fig-
ure 12.
9. Remove the nut and slide the coil off the valve
cartridge.
WARNING
Hydraulic oil hoses and lines may be under
high pressure. Hydraulic oil can be injected
into the body by pressure. To prevent possible
injury, shield yourself from any escaping oil.
Wrap a rag around the fitting and loosen the
fitting and loosen the connection slowly.
10. Loosen the selector valve cartridge slightly to re-
lieve pressure.
11. Remove the valve cartridge.
Install
1. Verify that the selector valve cartridge O-rings
are not damaged. Replace as needed.
2. Verify that the selector valve cartridge and valve
block are clean and not damaged.
1. VALVE BLOCK
2. REACH VALVE
3. HYDRAULIC HOSE FITTING
4. SIDESHIFT VALVE
5. TILT VALVE
Figure 12. Selector Valves
3. Lubricate the selector valve cartridge threads
and O-rings with clean hydraulic oil.
4. Install the valve cartridge and torque to 34 N•m
(25 lbf ft).
5. Slide the coil onto the valve cartridge with the
lettering out towards the coil retainer.
6. Install the nut and torque to 7 N•m (60 lbf in)
7. Connect the control wiring plug to the coil.
8. Install the locking screw into the coil plug.
9. Remove the clamps and blocks.
10. Connect battery and turn key switch to ON posi-
tion.
11. Operate each hydraulic function several times to
purge the air from the hydraulic circuit.
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